Liquid fuel collector and distributor ring for carburetors



Feb. 4, 1958 R. E. CADDOCK 2,822,253

LIQUID FUEL COLLECTOR AND DISTRIBUTOR RING FOR CARBURETORS Filed May is, 1955 INVENTOR. Pic/20rd E. C'Gdoock WITNE SS B Y 4&7770112121 Wf ATTORNEY I LIQUID. FUEL, COLLECTOR DISTRIBUTOR" RING FORI CARBURETORS' Richard E. Caddock, Ames, Iowa Application Ma'y, 16, .1955jjSe'rialN0; 508,3,6T?

4 :Claims'. (Cl; 48- -1841):

Thisainventiom-relates; toettuelzand tainymixing ameans 1:. for internal combustion engines and .moreaparticularlye to means for reducing the amount of liquid fuel entering the engine-intake manifold.

Many typesofdraftcarburetors have ;been developed. Substantially, all such carburetors have a.,.butterfly yalve in -the .carburetor throat; However, the..main.problem is thatof proper mixture, i. 'e., the. complete atomization ofg'thezliquid fuel into an air stream so that. .the- ,fuel mixturelentering the internal'combustion engine .willgbein a 'highly'gaseous state. Where devices herebefo'te have fallen down is. that although'at one time in the procedure theafuelfand. may have been properly mixed,. the charge at a latter stage broke down to such an extent that a considerable amount-.-of -.rawl liquidiuel passed to the engine.

Therefore; one-ofthe-principal-objects of my invention is to provide a carburetor means that collects raw unmixed liquid fuel in the carburetor throat, insures its later mixing with the air stream, and thus makes for fuel economy and engine power and smoothness.

A further object of this invention is to provide a carburetor auxiliary means for internal combustion engines that is easily installed and has no moving parts.

Still further objects of my invention are to provide an attachment for a standard carburetor that is economical in manufacture and durable in use.

These and other objects will be apparent to those skilled in the art.

My invention consists in the construction, arrangements, and combination, of the various parts of the device, whereby the objects contemplated are attained as hereinafter more fully set forth, specifically pointed out in my claims, and illustrated in the accompanying drawings, in which:

Fig. l is a vertical sectional view of the throat portion of an ordinary carburetor having my invention installed therein,

Fig. 2 is a top plan view of my device ready for installation and more fully illustrates its construction, and

Fig. 3 is a sectional view of my device taken on line 33 of Fig. 2.

The development of this invention resulted from the taking advantage of a fact not heretofore recognized by carburetor engineers. The basic laws of governing velocities of fluids vs. pressures of fluids have long been known. My first effort in evaluating the impact at various positions inside a carburetor throat related to the placement Pitot and Venturi tubes within the carburetor tube below the butterfly valve. The relative values of place locations are found in my application for United States Letters Patent, Serial No. 280,875, on an Automatic Ignition Advance, and filed April 7, 1952, now Patent No. 2,708,918. I found the presence of a high velocity air pattern in the area behind the leading edge of the butterfly valve or throttle plate during certain engine operations. Specifically, this high velocity air pattern 2,822,253 Patented- 'Feh-A, 1958 2 existediduringw partthrottle operation. This pattern is related'dir'ectly to engine speed at part 'throttle operation.

Thus; agiven fuelchargepassing through the throat would experience difi'e'rentconditions --at' dilferentlocations relative tothe butterfly valve and also at different engine speedsr It is for this reason that gasoline saving devices herebefore placed in carburetor tubes were notefiicient at allspeeds andconditio'ns:

Most experts-have assumed that-the high *velocity -pat-' tern was under the -low side' 'of -the=carburetor-valve plate.- My tests :showed exactly the -opposite.- Next, I replaced and -complete: fuelmixture was-being maintained. T hereason fon thi's wawthe -high velocitypattern under the high -side ofithe butterflyj valve. Therefore, the purpose ofiz'ithis' invention is ttrcolle'ct this" raw liquid fuel under the low=side of the=-butterfly=valve and conduit it to under the high side of the-butterflyvalve= where it is attacked by the high velocity" pattern and *gasified.--

re this endi iir'the drawings I'us-e 'the"numeral 10' to -designate the fuel passagewaycreated by the usual tubularmembers Mand -12 ofthe carburetor; These two. parts l l and lz are'usually separateand-detachably held togethercbyj cap sorews ma The -numeral 14' designates the carburetor butter-fly valve rotatably-mounted within theupassageway l0i In thispassa'gewaydt) I mount an, aroulanopenended trough" 15. This-trough maybe cast.

in theacarbu-retonpartor installed separately as shown in the drawings. It is closely adjacent the inside wall of the passageway 10 and has its two ends spaced apart and this space between its two ends is under the high side of the butterfly valve, as shown in Fig. 1. Also this trough, which is a liquid fuel collecting conduit ring is placed at an angle to the longitudinal plane of the passageway 10 with its high side under the low side of the butterfly valve. Therefore, unmixed liquid fuel running down on the inside of the wall of the passageway 10 in the area of the low side of the butterfly valve will pass into this trough l5, thence flow downwardly and to the left, out the ends of the trough, and out into the high velocity air stream, where it is immediately mixed and gasified into a properly mixed fuel charge. One reason for this is that the higher the velocity of a fluid, the less its pressure. A ledge 15 between the two ends of the circular trough may be used to further aid in directing the captured liquid into the high velocity area pattern.

The trough conduit may be installed in any suitable manner, such as by soldering, welding, bolting or like. However, in the drawings I have the walls of the trough extend upwardly and then bent outwardly to form a gasket flange 17. This flange 17 extends between the two parts 11 and 12 and makes for easy and quick installation.

The results of this method of carburation stems from my herebefore discovery that during all part throttle operation of an engine a localized high velocity pattern is developed-below the high side of the throttle valve. This high velocity stream diminishes and disappears as the throttle is opened to full throttle position. By means of a Pitot tube, static tube and a mercury manometer, I have determined that the localized high velocity stream develops a velocity head of 1" Hg (approximately) per 10 M. P. H. cruising speed up to a maximum on the engine tested of 9" Hg. Positioning of the Pitot tube at other locations below the carburetor, below the low side of the throttle valve or at the center of the manifold throat failed to indicate appreciable or any velocity at these points.

Thus, my device operates when needed, thereby assuring proper fuel mixture at all times and under all conditions. This makes for economic and uniform engine operation.

Many carburetor means vary as to shape, 'des ign and arrangement of elements. In certain installations the member 12 is actually the intake manifold of the internal combustion engine. buretor throat tube I have in mind any passageway leading from the carburetor proper to the inside of the combustion chamber of the engine.

It is submitted that the invention shown and described is aptly suited to achieve the purposes intended and is characterized by a combination of highly useful and mutually cooperating elements that combine their respective and proportionate functions in accomplishing the objects sought to be obtained.

I claim:

1. In combination with the throat tube of a carburetor having a butterfly valve, a split liquid collecting ring on the inside wall of said throat tube, below said butterfly valve and having its split located under the high side of said butterfly valve; said ring extending at an angle to the longitudinal plane of said throat tube with its high side under the low side of said butterfly valve and its low side under the high side of said butterfly valve.

2. In combination with the throat tube of a carburetor having a butterfly valve, a split liquid collecting ring having its two ends spaced apart and on the inside wall of said throat tube, below said butterfly valve and having its split located under the high side of said butterfly valve; said ring extending at an angle to the longitudinal plane of said throat tube with its high side under the low side of said butterfly valve and its low side under the high side of said butterfly valve, and a ledge extending between the bottom split ends of said collecting ring.

However, when I refer to thecar- '3. In combination with the throat tube of a carburetor having a butterfly valve, a split trough shaped liquid collecting ring on the inside wall of said throat tube, below said butterfly valve and having its split located under the high side of said butterfly valve; said ring extending at an angle to the longitudinal plane of said throat tube with its high side under the low side of said butterfly valve and its low side under the high side of said butterfly valve.

4. In combination with the throat tube of a carburetor having a butterfly valve, a split liquid collecting ring having its two ends spaced apart and on the inside wall of said throat tube, below said butterfly valve and having its split located under the high side of said butterfly valve; said ring extending at an angle to the longitudinal plane of said throat tube with its high side under the low side of said butterfly valve and its low side under the high side of said butterfly valve, and a substantially horizontal ledge extending between the. bottom split ends of said collecting ring. a

I References Cited in thefile of this patent UNITED STATES PATENTS 1,392,473 Ball Oct. 4, 1921 2,083,752 Trussell June 15, 1937 2,175,675 Swengel Oct. 10, 1939 2,292,071 Haibe Aug. 4, 1942 2,298,563 Hersch Oct. 13, 1942 2,613,143 Malouf -i Oct. 7, 1952 2,614,037 Linn Oct. 14, 1952 2,694,561 Rose Nov. 16, 1954 FOREIGN PATENTS 527,372 Great Britain Oct. 8, 1940 

1. IN COMBINATION WITH THE THROAT TUBE OF A CARBURETOR FHAVING A BUTTERFLY VALVE, A SPLIT LIQUID COLLECTING RING ON THE INSIDE WALL OF SAID THROAT TUBE, BELOW SAID BUTTERFLY VALVE AND HAVING ITS SPLIT LOCATED UNDER THE HIGH SIDE OF SAID BUTTERFLY VALVE; SAID RING EXTENDING AT AN ANGLE TO THE LONGITUDINAL PLANE OF SAID THROAT TUBE WITH ITS HIGH SIDE UNDER THE LOW SIDE OF SAID BUTTERFLY VALVE AND ITS LOW SIDE UNDER THE HIGH SIDE OF SAID BUTTERFLY VALVE. 